staging: rtl8188eu: rename HalSetBrateCfg() - style
[linux/fpc-iii.git] / include / net / kcm.h
blob2a8965819db0fa052be0ff3c852005f904536e65
1 /*
2 * Kernel Connection Multiplexor
4 * Copyright (c) 2016 Tom Herbert <tom@herbertland.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 */
11 #ifndef __NET_KCM_H_
12 #define __NET_KCM_H_
14 #include <linux/skbuff.h>
15 #include <net/sock.h>
16 #include <net/strparser.h>
17 #include <uapi/linux/kcm.h>
19 extern unsigned int kcm_net_id;
21 #define KCM_STATS_ADD(stat, count) ((stat) += (count))
22 #define KCM_STATS_INCR(stat) ((stat)++)
24 struct kcm_psock_stats {
25 unsigned long long tx_msgs;
26 unsigned long long tx_bytes;
27 unsigned long long reserved;
28 unsigned long long unreserved;
29 unsigned int tx_aborts;
32 struct kcm_mux_stats {
33 unsigned long long rx_msgs;
34 unsigned long long rx_bytes;
35 unsigned long long tx_msgs;
36 unsigned long long tx_bytes;
37 unsigned int rx_ready_drops;
38 unsigned int tx_retries;
39 unsigned int psock_attach;
40 unsigned int psock_unattach_rsvd;
41 unsigned int psock_unattach;
44 struct kcm_stats {
45 unsigned long long rx_msgs;
46 unsigned long long rx_bytes;
47 unsigned long long tx_msgs;
48 unsigned long long tx_bytes;
51 struct kcm_tx_msg {
52 unsigned int sent;
53 unsigned int fragidx;
54 unsigned int frag_offset;
55 unsigned int msg_flags;
56 struct sk_buff *frag_skb;
57 struct sk_buff *last_skb;
60 /* Socket structure for KCM client sockets */
61 struct kcm_sock {
62 struct sock sk;
63 struct kcm_mux *mux;
64 struct list_head kcm_sock_list;
65 int index;
66 u32 done : 1;
67 struct work_struct done_work;
69 struct kcm_stats stats;
71 /* Transmit */
72 struct kcm_psock *tx_psock;
73 struct work_struct tx_work;
74 struct list_head wait_psock_list;
75 struct sk_buff *seq_skb;
76 u32 tx_stopped : 1;
78 /* Don't use bit fields here, these are set under different locks */
79 bool tx_wait;
80 bool tx_wait_more;
82 /* Receive */
83 struct kcm_psock *rx_psock;
84 struct list_head wait_rx_list; /* KCMs waiting for receiving */
85 bool rx_wait;
86 u32 rx_disabled : 1;
89 struct bpf_prog;
91 /* Structure for an attached lower socket */
92 struct kcm_psock {
93 struct sock *sk;
94 struct strparser strp;
95 struct kcm_mux *mux;
96 int index;
98 u32 tx_stopped : 1;
99 u32 done : 1;
100 u32 unattaching : 1;
102 void (*save_state_change)(struct sock *sk);
103 void (*save_data_ready)(struct sock *sk);
104 void (*save_write_space)(struct sock *sk);
106 struct list_head psock_list;
108 struct kcm_psock_stats stats;
110 /* Receive */
111 struct list_head psock_ready_list;
112 struct bpf_prog *bpf_prog;
113 struct kcm_sock *rx_kcm;
114 unsigned long long saved_rx_bytes;
115 unsigned long long saved_rx_msgs;
116 struct sk_buff *ready_rx_msg;
118 /* Transmit */
119 struct kcm_sock *tx_kcm;
120 struct list_head psock_avail_list;
121 unsigned long long saved_tx_bytes;
122 unsigned long long saved_tx_msgs;
125 /* Per net MUX list */
126 struct kcm_net {
127 struct mutex mutex;
128 struct kcm_psock_stats aggregate_psock_stats;
129 struct kcm_mux_stats aggregate_mux_stats;
130 struct strp_aggr_stats aggregate_strp_stats;
131 struct list_head mux_list;
132 int count;
135 /* Structure for a MUX */
136 struct kcm_mux {
137 struct list_head kcm_mux_list;
138 struct rcu_head rcu;
139 struct kcm_net *knet;
141 struct list_head kcm_socks; /* All KCM sockets on MUX */
142 int kcm_socks_cnt; /* Total KCM socket count for MUX */
143 struct list_head psocks; /* List of all psocks on MUX */
144 int psocks_cnt; /* Total attached sockets */
146 struct kcm_mux_stats stats;
147 struct kcm_psock_stats aggregate_psock_stats;
148 struct strp_aggr_stats aggregate_strp_stats;
150 /* Receive */
151 spinlock_t rx_lock ____cacheline_aligned_in_smp;
152 struct list_head kcm_rx_waiters; /* KCMs waiting for receiving */
153 struct list_head psocks_ready; /* List of psocks with a msg ready */
154 struct sk_buff_head rx_hold_queue;
156 /* Transmit */
157 spinlock_t lock ____cacheline_aligned_in_smp; /* TX and mux locking */
158 struct list_head psocks_avail; /* List of available psocks */
159 struct list_head kcm_tx_waiters; /* KCMs waiting for a TX psock */
162 #ifdef CONFIG_PROC_FS
163 int kcm_proc_init(void);
164 void kcm_proc_exit(void);
165 #else
166 static inline int kcm_proc_init(void) { return 0; }
167 static inline void kcm_proc_exit(void) { }
168 #endif
170 static inline void aggregate_psock_stats(struct kcm_psock_stats *stats,
171 struct kcm_psock_stats *agg_stats)
173 /* Save psock statistics in the mux when psock is being unattached. */
175 #define SAVE_PSOCK_STATS(_stat) (agg_stats->_stat += stats->_stat)
176 SAVE_PSOCK_STATS(tx_msgs);
177 SAVE_PSOCK_STATS(tx_bytes);
178 SAVE_PSOCK_STATS(reserved);
179 SAVE_PSOCK_STATS(unreserved);
180 SAVE_PSOCK_STATS(tx_aborts);
181 #undef SAVE_PSOCK_STATS
184 static inline void aggregate_mux_stats(struct kcm_mux_stats *stats,
185 struct kcm_mux_stats *agg_stats)
187 /* Save psock statistics in the mux when psock is being unattached. */
189 #define SAVE_MUX_STATS(_stat) (agg_stats->_stat += stats->_stat)
190 SAVE_MUX_STATS(rx_msgs);
191 SAVE_MUX_STATS(rx_bytes);
192 SAVE_MUX_STATS(tx_msgs);
193 SAVE_MUX_STATS(tx_bytes);
194 SAVE_MUX_STATS(rx_ready_drops);
195 SAVE_MUX_STATS(psock_attach);
196 SAVE_MUX_STATS(psock_unattach_rsvd);
197 SAVE_MUX_STATS(psock_unattach);
198 #undef SAVE_MUX_STATS
201 #endif /* __NET_KCM_H_ */